C668 Invisibility Array Disk(part I)

After five or six metals were poured into the furnace, Bai Yu Zhe began to control the Pill Fire and slowly refined the impurities within the metal, turning it into a liquid form. This method of refining was actually inferior to a blacksmith's Thousand Tempering Hundred Refining technique. This was one of the reasons why an alchemist was inferior to a blacksmith in refining array discs.

However